Calipers or dividers.



J. HERMANOWITZ.

CALIPERS OR DIVIDERS.

APPLICATION FILED MAB..23, 1914.

1 104,890. Patented July 28, 1914.

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JULIUS HERMANOWITZ, OF IPHILADELFHIA, PENNSYLVANIA.

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Specification of Letters Patent. Patented lily 28, 1914.

Application filed March 28, 1914, Serial No. 826,617.

To all whom it may concern Be it known that I, JULIUS I-lnnrrmvowrrz, asubject of the Czar of Russia, residing at Philadelphia, in the countyof Philadelphia, and State of Pennsylvania, have invented certain newand useful Improvements in Calipers or Dividers, of which the followingis a specification.

My invention relates to improvements in calipers or dividers, the objectof the invention being to provide an instrument of this character whichis provided with improved means for moving the legs and locking them atany adjustment. A further obj eot is to provide an improved means forconnecting attachments to the legs which securely holds the attachmentand permits of the reversal of the attachment so as to permit theinstrument a Wide range of usefulness. v

With these and other objects in view, the invention consists in certainnovel features of construction and combinations and ar rangements ofparts as will be more fully hereinafter described and pointed out in theclaims.

In the accompanying drawings: Figure 1 is a view in side elevationillustrating two of the attachments connected to the legs of theinstrument and two additional attachments independent thereof. Fig. 2 isa fragmentary view in longitudinal section on an enlarged scaleillustrating the means for adjusting the legs of the instrument and themeans for connectingan attachment to one of the legs. Fig. 3 is afragmentary view in elevation showing an attachment secured to the legof the instrument. Fig. 4 is a view in section on an enlarged scale onthe line 4-4 of Fig. 1. Fig. 5 is a view in section on the line 5-5 ofFig. 1. Fig. 6 is a similar view in section on the line 66 of Fig. 1.Fig. 7 is a view in section on the line 77 of Fig. 1, and Fig. ,8 is aview in elevation of one of the attachments shown in Fig. 1.

1, 1 represent the legs of the instrument which are pivo-tally securedin a frame 2 by means of rivets 3, and at their pivoted ends the legs 1are provided with worm segments 4 meshing with a worm 5 between them.The segments 4 are curved transversely as well as concentrically so asto provide a relatively large contacting surface with the worm, but thelatter constitutes but a relatively few threads or turns as the largerdiameter of said shaft.

clearly shown in Fig. 2. The worm 5 is an integral part of the wormshaft 6, the latter havin at its outer end win s '7 to facilitate theturning of the shaft. The frame 2 con sists of parallel side plates 8, 8connected at their inner ends by an integral cross bar 9, the, latterhaving an opening 10 therein through which the reduced and threaded end11 of the shaft 6 projects. A. washer 12 is positioned around thereduced end 11 of securely hold' the worm shaft against turn-- ingmovement, and thereby lock the instrument at any position of adjustment.The nut 14 serves to limit the longitudinal movement of the shaft 6,hence when this nut is loosened, the legs 11 are permitted a certainamount of quick adjustment as the: shaft 6 will be moved longitudinallyby the pivotal movement of the legs within the limit permitted by thenut 14. I provide two pair of attachments, both pairs of which are shownin elevation in Fig. 1. The attachments 15 constitute caliper memberswhich when in the position shown in Fig.

1 are for measuring outside diameters or other linear measurements, andwhen re versed so that they curve o'utwardly'instead of inwardly, theyare adapted for measuring inside diameters. have pointed ends 17 andcurved ends 18,

and these attachments may be positioned with eitherend exposed as willbe hereinafter explained so that by reversing them. in

connection with the legs 1, they are capable of a wide range ofusefulness. The legs 1 The attachments 16' on their inner faces areprovided with longitudinal grooves 19 to receive longitudinal webs 20 onthe attachments, and set screws 21 are located in threaded openings 22in the legsl, and have heads 23 constituting turn buttons which areadapted to be projected through slots 24 in the attachments,

and when turned at a right angle to the slot,

securely lock the attachment to the leg of the instrument- Theattachments 16 are provided with two of these slots 24 so that they maybe reversed with relation to the legs of the instrument, and withthisform of attachment, I preferably provide the webs 20. of a lengththroughout the greater portion of the attachment. The attachments, wherethey engage the legs 1, are enlarged transversely so that they form ineffect, relatively wide strips 25 with the webs 20 between their sideedges. The strips 20 are of the same width as the legs 1, and aresecurely clamped against the inner surface of the legs by the screws 21.The grooves 19 extend substantially throughout the length of the leg,but

at the opening 22 for the screw 21, the in ner wall of the groove bulgesoutwardly so that a relatively long bearing is had for the screw.

With my improved device above described, different attachments may bereadily se-- cured to the legs and can be used in many ways, both inmeasuring and in scoring, and I do not limit myself to any particularuse of the instrument.

By reason of my improved means for operating the legs, they may bespread out as far as desired, and in fact, the legs may be brought to aposition in substantial alinement so that the full capacity of theinstrument may be had.

Various slight changes might be made in the general form and arrangementof parts described without departing from my invention, and hence I donot limit myself to the precise details set forth, but consider myselfat liberty to make such changes and alterations as fairly fall withinthe spirit and'scope of the appended claims.

Having thus described my invention,what

I claim as new and desire to secure by Let-- ters Patent is:

1. An instrument of the character described, comprising a frame havingside plates, a bar connecting the side plates and having an openingtherein, legs pivotally connected to the frame between the side platesand having worm segments, a shaft having a reduced end projected throughsaid opening, a nut screwed onto the reduced end of said shaft, a wormon the shaft engaging the worm segments, and an enlargement on the endof the shaft, substantially as described.

2. An instrument of the character described, comprising a frame havingside plates, a bar connecting the side plates and having an openingtherein, legs pivotally connected to the frame between the side platesand having worm segments, a shaft having a reduced end projected throughsa1d opening, a nut screwed onto the reduced 1 end of said shaft, a wormon the shaft engaging the worm segments, and an enlargement on the endof the shaft, said shaft having an annular shoulder thereon, and awasher around the shaft interposed between the shoulder and the crossbar, substantially as described.

3. An instrument of the character described, comprising a frame, legspivotally secured in the frame and having worm segments at their endscurved transversely, a worm shaft mounted in the frame and having a wormthereon engaging the segment,

means for turning the worm shaft, and

means controlling the longitudinal movement of the worm shaft andregulating the quick adjustment of the legs, substantially as described.

4:. An instrument of the character described, comprising a frame, legspivotally connected to the frame, means for moving the legs on theirpivots, said legs having longitudinal grooves in their inner faces,attachments adapted to bear against the inner faces of the legs andhaving longitudinal Webs thereon positioned in the grooves 0f the legs,and means for clamping the at- ;tachments against the legs,substantially as described.

5. An instrument of the character de scribed, comprising a frame, legspivotally connected to the frame, means for movlng ,the legs on theirplvots, sa1d legs having longitudinal grooves in their inner faces,

attachments adapted to bear against the inner faces of the legs andhaving longitudlnal webs thereon positioned in the grooves In testimonywhereof I have signed my :name to this specification in the presence oftwo subscribing witnesses.

JULIUS HERMANOWVITZ.

lVitnesses DAVID NEUMAN, IVILLIAM KATIN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

